:root {
  --ink: #1b3a4b;
  --ink-deep: #102530;
  --amber: #f4a261;
  --amber-deep: #e76f51;
  --paper: #f7f1e8;
  --card: #fffdf8;
  --muted: #4d5d67;
  --line: #d7cbb8;
}

* { box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Iowan Old Style", Georgia, "Songti SC", "SimSun", "Microsoft YaHei", serif;
  line-height: 1.85;
}

.top {
  background: var(--ink);
  color: #f6ead7;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 4.5vw;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  font-weight: 700;
}
.nav { display: flex; flex-wrap: wrap; gap: 16px; font-family: "Segoe UI", "Microsoft YaHei", sans-serif; }
.nav a { color: #f6ead7; text-decoration: none; font-size: 14px; }
.nav a:hover { color: var(--amber); }

.hero {
  padding: 50px 4.5vw 36px;
  background: var(--ink);
  color: #f8efe3;
}
.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(26px, 3.6vw, 38px);
  max-width: 16em;
  line-height: 1.35;
}
.hero p { margin: 0; max-width: 42em; color: #d9c7b0; font-size: 17px; }

.wrap { width: min(1100px, 92vw); margin: 0 auto; }
section { padding: 52px 0; }
h2 { margin: 0 0 16px; font-size: clamp(22px, 2.6vw, 28px); line-height: 1.4; }
.lead { color: var(--muted); margin: 0 0 22px; max-width: 48em; }
p { margin: 0 0 16px; }

.mosaic {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  grid-template-rows: auto auto auto;
  gap: 14px;
}
.tile {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 22px 20px;
}
.tile-lg { grid-row: 1 / 3; background: var(--ink); color: #f6ead7; }
.tile-lg h3, .tile-wide h3, .tile h3 { margin: 0 0 10px; font-size: 20px; }
.tile-lg p { color: #d9c7b0; }
.tile-wide { grid-column: 1 / -1; border-left: 6px solid var(--amber); }
.tile svg { display: block; margin-bottom: 12px; }

table { width: 100%; border-collapse: collapse; background: var(--card); font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 12px 14px; text-align: left; vertical-align: top; }
th { background: var(--ink); color: #f6ead7; }
td:last-child { color: var(--amber-deep); font-weight: 600; }

.gaps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.gap {
  background: var(--card);
  padding: 20px 18px;
  border-top: 4px solid var(--amber);
}
.gap h3 { margin: 0 0 8px; font-size: 18px; }

.steps {
  display: flex;
  gap: 0;
  background: var(--ink);
  color: #f6ead7;
}
.step { flex: 1; padding: 20px 16px; border-right: 1px solid #2b5163; }
.step:last-child { border-right: none; }
.step b { display: block; color: var(--amber); margin-bottom: 8px; }
.step p { color: #d9c7b0; font-size: 14px; }

.faq-list { margin: 0; padding: 0; list-style: none; }
.faq-list li {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 16px 18px;
  margin-bottom: 10px;
}
.faq-list h3 { margin: 0 0 8px; font-size: 17px; }
.faq-list p { color: var(--muted); font-size: 15px; }

.site-footer {
  background: var(--ink-deep);
  color: #e6d3bc;
  padding: 34px 4.5vw 40px;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  font-size: 14px;
}
.site-footer p { margin: 0 0 10px; }

@media (max-width: 900px) {
  .mosaic, .gaps { grid-template-columns: 1fr; }
  .tile-lg { grid-row: auto; }
  .tile-wide { grid-column: auto; }
  .steps { flex-direction: column; }
  .step { border-right: none; border-bottom: 1px solid #2b5163; }
  .top { flex-direction: column; align-items: flex-start; gap: 10px; }
}